Definition of lifespan in English:

lifespan

Line breaks: life|span
Pronunciation: /ˈlʌɪfspan
 
/

noun

The length of time for which a person or animal lives or a thing functions: the human lifespan
More example sentences
  • As humans lengthened lifespans with better nutrition and hunting skills, childhood also lengthened.
  • They are slow-breeding and long-lived animals, achieving lifespans of 70 years or so.
  • I suggested that extending human lifespans might lead to extended creativity.

Definition of lifespan in:

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Word of the day internecine
Pronunciation: ˌintərˈnesēn
adjective
destructive to both sides in a conflict